Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle II Collaboration, I. Adachi, Y. Ahn, N. Akopov, S. Alghamdi
| Summary:
We measure the time-integrated $CP$ asymmetry, $A_{CP}$, in
$D^0topi^0pi^0$ decays reconstructed in $e^+e^-to cbar{c}$ events
collected by Belle II during 2019–2022. The data corresponds to an integrated
luminosity of 428$mathrm{fb}^{-1}$. The $D^0$ decays are required to originate
from the flavor-conserving $D^{*+} to D^0 pi^+$ decay to determine the charm
flavor at production time. Control samples of $D^0to K^- pi^+$ decays, with
or without an associated pion from a $D^{*+}$ decay, are used to correct for
detection asymmetries. The result, $A_{CP}(D^0topi^0pi^0) = (0.30pm 0.72pm
0.20)%$, where the first uncertainty is statistical and the second systematic,
is consistent with $CP$ symmetry.
| Search Query: ArXiv Query: search_query=au:”T. Higuchi”&id_list=&start=0&max_results=3